Which condition is most strongly associated with resistant hypertension in adults?

Which condition is most strongly associated with resistant hypertension in adults?

• A. Obstructive sleep apnea
• B. Hypothyroidism
• C. Pheochromocytoma
• D. Chronic kidney disease

Answer: (A)

Obstructive sleep apnea is a major driver of resistant hypertension because repeated nighttime episodes of airway collapse cause intermittent hypoxia and sleep fragmentation that provoke durable sympathetic activation, increased catecholamines, and activation of endothelin and the renin-angiotensin-aldosterone system. These changes raise both daytime and nocturnal blood pressures and blunt the normal nocturnal dip, making blood pressure harder to control despite multiple medications. In adults with resistant hypertension, OSA is highly prevalent, and treatment with CPAP or other therapies can improve blood pressure in many patients, underscoring its strong causal role. While hypothyroidism, pheochromocytoma, and chronic kidney disease can contribute to hypertension, they do not show as consistent or as strong an association with resistance as sleep-disordered breathing, making obstructive sleep apnea the most impactful link in this context.

Obstructive sleep apnea is a major driver of resistant hypertension because repeated nighttime episodes of airway collapse cause intermittent hypoxia and sleep fragmentation that provoke durable sympathetic activation, increased catecholamines, and activation of endothelin and the renin-angiotensin-aldosterone system. These changes raise both daytime and nocturnal blood pressures and blunt the normal nocturnal dip, making blood pressure harder to control despite multiple medications. In adults with resistant hypertension, OSA is highly prevalent, and treatment with CPAP or other therapies can improve blood pressure in many patients, underscoring its strong causal role. While hypothyroidism, pheochromocytoma, and chronic kidney disease can contribute to hypertension, they do not show as consistent or as strong an association with resistance as sleep-disordered breathing, making obstructive sleep apnea the most impactful link in this context.